One subtlety: The image, if you click on it, is from a collection in an article by an anti-2A writer who is appalled at the custom in early America for parents to have pictures taken of their sons with guns. As the writer puts it:

The level of male violence we live with today should not shock a nation where pictures like these are endemic. The archives of American social history provide little comfort for those of us anxious to sever the connection between boys and guns. We may be working against the grain, but it is worth it.